A denial of service via regular expression in the py.path.svnwc component of py (aka…
Priority MEDIUM 40CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 5 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.
Summary
A denial of service via regular expression in the py.path.svnwc component of py (aka python-py) through 1.9.0 could be used by attackers to cause a compute-time denial of service attack by supplying malicious input to the blame functionality.
Why it matters now
EPSS 0.04537 91st percentileScored 2026-11-07
Fix Partial py (PyPI): 1.10.0Red Hat: 5 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | py (PyPI) | before 1.10.0 | 1.10.0 | Patch available | GHSA-hj5v-574p-mj7c |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- py (PyPI) Vendor— Affected before 1.10.0 Fixed in 1.10.0 Patch available GHSA-hj5v-574p-mj7c
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:pytest:py:*:*:*:*:*:*:*:* | up to 1.9.0 | Vulnerable | pytest |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* | 8.8 | Vulnerable | Oracle |
- cpe:2.3:a:pytest:py:*:*:*:*:*:*:*:* Versions up to 1.9.0 Vulnerable ·pytest
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* Versions 8.8 Vulnerable ·Oracle
Remediation
- Fix · GHSA-hj5v-574p-mj7c py (PyPI) Fixed in 1.10.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 3.11 | Affected | No fix yet: Fix deferred |
| Red Hat OpenStack Platform 10 (Newton) | Affected | No fix planned: Out of support scope |
| Red Hat OpenStack Platform 13 (Queens) | Affected | No fix planned: Will not fix |
Not affected: 1 product
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2020-29651
- 2026-10-03 Alias added: GHSA-hj5v-574p-mj7c
References
Advisory 7
Other 7
- https://github.com/pypa/advisory-database/tree/main/vulns/py/PYSEC-2020-92.yaml
- https://github.com/pytest-dev/py
- https://lists.debian.org/debian-lts-announce/2024/11/msg00024.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AYWNYEV3FGDHPIHX4DDUDMFZ6NLCQRC4
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHDTINIBJZ67T3W74QTBIY5LPKAXEOGR
- https://lists.fedoraproject.org/archives/list/[email protected]/message/AYWNYEV3FGDHPIHX4DDUDMFZ6NLCQRC4
- https://lists.fedoraproject.org/archives/list/[email protected]/message/CHDTINIBJZ67T3W74QTBIY5LPKAXEOGR
Sources
- CVE-2020-29651 · CVE Program
- CVE-2020-29651 · NVD
- FIRST EPSS
- GHSA-hj5v-574p-mj7c · GitHub Advisory Database · CC BY 4.0
- CVE-2020-29651 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences